HP 33S - Page 324

D–4 More about Solving
File name 33s-E-Manual-1008-Publication(1st).doc Page : 386
Printed Date : 2003/10/8 Size : 13.7 x 21.2 cm
h
X
)
2
Ã
6
¸ h
X
Ù
8
Ï



º Î


Checksum and length.
Å

Cancels Equation mode.
Now, solve the equation to find the root:
Keys: Display: Description:
0
e
X 10

_ Initial guesses for the
root.
º d

Selects Equation mode;
displays the left end of
the equation.
Û
X



Solves for X; displays the
result.
<

Final two estimates are
the same to four decimal
places.
<



f(x) is very small, so the
approximation is a
g
ood
root.
Example: An Equation with Two Roots.
Find the two roots of the parabolic equation:
x
2
+ x – 6 = 0.
Enter the equation as an expression:
Keys: Display: Description:
º d

Selects Equation mode.
h
X
)
2
Ù
h
X
Ã
6
Ï


Enters the equation.
º Î


Checksum and length.
Å

Cancels Equation mode.
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